Computer Science

Option: C
Explanation :Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991, by Linus Torvalds. Linux is typically packaged in a Linux distribution.

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Option: D
Explanation :BIOS which stands for Basic Input Output System, is software stored on a small memory chip on the motherboard. It’s BIOS that’s responsible for the POST and therefore makes it the very first software to run when a computer is started. The BIOS firmware is non-volatile, meaning that its settings are saved and recoverable even after power has been removed from the device.
BIOS instructs the computer on how to perform basic functions such as booting and keyboard control. BIOS is also used to identify and configure the hardware in a computer such as the hard drive, floppy drive, optical drive, CPU, memory, and related equipment.

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Option: B
Explanation :Microsoft Corporation is an American multinational technology company with headquarters in Redmond, Washington(USA). It develops, manufactures, licenses, supports, and sells computer software, consumer electronics, personal computers, and related services. Its best known software products are the Microsoft Windows line of operating systems, the Microsoft Office suite, and the Internet Explorer and Edge web browsers.

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Option: D
Explanation :In Microsoft Word and other word processor programs, pressing Ctrl+R aligns the line or selected text to the right of the screen.
In Microsoft Outlook, pressing Ctrl+R replies to an e-mail.
In Microsoft PowerPoint, the Ctrl+R shortcut key aligns the line or selected text to the right side of the slide.
In Microsoft Excel and other spreadsheet programs, pressing Ctrl+R fills the row cell to the right with the contents of the selected cell.
In all major Internet browsers (e.g., Chrome, Edge, Firefox, Opera), pressing Ctrl+R refreshes (reloads) the open page.

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Option: D
Explanation :compact discs or CDs can be divided into three main categories. (1)read-only (2) write-once disc (3) Erasable or Rewrite-able CD
(1) Read Only:- These discs you purchase with the data or information already on the compact disk.
The information is placed on the compact disk at the time the disc is manufactured. All you can do with the disc is play or read it.
(2) Write Once Disc:- This compact disc is also known as the recordable CD or CD-R. This disc is purchased blank and information can be written or recorded to the disc. Once the disc is full, it essentially becomes a read-only disc because no more information can be recorded to the disc and the previously recorded information cannot be erased and the compact disc cannot be reused.
(3) Erasable or Rewrite-able CD:- The third type of compact disc is the erasable or rewriteable CD known as the CD-RW. This disc is also purchased blank. Information can be written to the disc and then this information can be erased and the compact disk reused.

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Option: A
Explanation :Ctrl+Alt+F4:-have no generic description for this shortcut.
Alt+F4:- is a shortcut key most often used to close the current active window all programs. For example, if you pressed the shortcut key now while reading this page on your computer browser, it would close the browser window and all open tabs.
Ctrl+F4:- In Microsoft Windows, pressing Ctrl+F4 will close the active tab or window in a program that supports more than one tab or window to be opened.

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Option: B
Explanation :MICR (magnetic ink character recognition) is a technology used to verify the legitimacy or originality of paper documents, especially checks. Special ink, which is sensitive to magnetic fields, is used in the printing of certain characters on the original documents. Information can be encoded in the magnetic characters.
The use of MICR can enhance security and minimize the losses caused by some types of crime.

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Option: E
Explanation :From these options floppy disk and universal serial bus(USB) can be carried around easily.
Floppy Disk:- A floppy disk is a data storage device also known as floppies or diskettes. Floppy disks were developed by IBM in the early 1970s. When they are widely accessible in the late 1970s and 1980s then they became the primary storage method for most computer. The popular type of floppy disk is 3 ½-inch.

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Option: B
Explanation :No explanation is available for this question. To view user comments or add your comments please Click Here..

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Option: D
Explanation :A computer program is a list of instructions that tell a computer what to do. Everything a computer does is done by using a computer program. A computer program is written in a programming language.

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